Pan concentrator



@61. 9,1923. 1,470,011 I v F. E. JOHNE$SE PAN CONCENTRATOR Filed MarchV50. 1922 3 Sheets-sheaf 1 WITNESSES 'NVENTOR F. E. Jolmesse,

Oct. 9 1923.

F. E. JOHNESSE PAN GONCENTRATOR Filed March 50. 1922 3 Sheets-Sheet 2INVENTOR E. E; J0 finesse Oct. 9 1923. 1,470,011

F. E. JQHNEISSE PAN CONCENTRATOR Filed March 50, 1922 I5 Sheets-Sheet 3ATTORNEYS Patented Uct. 9, 1923.

UNETED @TATES FRANK E. JOHNESSE, OF BOISE, IDAHO.

PAN oononn'rnaron.

Application filed March so, 1929.. 3 Serial No. 548,010.

T all whom it may] concern:

Be it known that I, FRANK E. JoHNEssE, a citizen of the United States,and a resident of Boise, in the county of Ada and State of Idaho, haveinvented a new and Improved Pan Concentrator, of which the following isa description.

My invention relates to concentrators and more particularly to panconcentrators.

Pan concentrators in general use leave much to be desired with regard toa thor ough separation of the heavier particles of values from theslimes, especially where but slight variation of difference in specificgravity exists between the components of the material being treated andalso the ordinary pan concentrator has comparatively limited capacitycompared to the motive power required to be expended and the spaceoccupied by the concentrator.

My invention has for its general object to provide a concentratorimproved over the prior devices with respect to capacity and withrespect to an increased recovery of the values from the materialtreated.

More specifically, an object of the inven tion is to provide a pan thatwill effect a stratification of the materials for the escape of theheavier particles and values in a plane below the tailings discharge ofthe pan and from a point radially outward from the zone in which theslimes collect.

T he nature of the invention and its distinguishing features andcharacteristics will clearly appear as the description proceeds.

Reference is to be had to the accompanying drawings forming apart ofthis specification, it being understood that the drawings are merelyillustrative of one example of the invention.

Figure 1 is a plan view of a pan concentrator constituting oneembodiment of my invention;

'Figure 2 centrator Figure 3 is an inverted sectional plan view, thesection being indicated by the line 33, Figure 4, and the pivot of thebearing member On the base omitted;

Figure 4 is a vertical section as by the line 4L4l, Figure 1;

Figure 5 is a fragmentary elevation showing a portion of the partitionor the division plate; i

Figure 6 is a plan view illustrating the invention in a modified form;

is a side elevation of said conindicated Figure 7 is a side elevation ofthe concentrator shown in Figure 6; i

Figure 8 is a detail partly in vertical section and partly in elevationshowing the preferred form of the concentrates discharge.

Referring at first to Figures 1 to 5 of the drawings in which thepreferred embodiment of my invention is illustrated, the concentratorincludes a central distributing structurelO 1n this form of theinvention made conical in shape and adapted tore-' 'ceive at its center'the material fed in any approved way, a fragment of a central feed pipe11 being indicated. Said structure is formed with a post 12 at theunderside having a vertical blind bearing bore 13 in its lower end tofit over a vertical bearing member 14 on a central base 15, the post 12having a flange 16 at the bottom between which and the base ballbearings 17 may advantageously be employed, said base and flange beingchanneled annularly to constitute'a ball race.

The outer portion of the structure 10 is in the form of an annularvertical wall 18 which constitutes the inner wall of a channel 19 formedby said wall and an outer shell 20. Said shell 20 adj acent. to the basethereof is directed outwardly and downwardly to form at the bottom ofthe channel an annular chamber 21 which is thus offset outwardly fromthe shell 20 for the escape of the heavier particles under thecentrifugal force developed in the oscillation'of the pan, as willappear. The pan is adapted to oscillate on rollers 23 in any suitablesupporting structure partially conventionally indicated at 22, Figure4r.

Extending about the pan in thecentering channel 19 is a verticalpartition or division plate 241 dividing the channel into two annularcompartments, one alongside of the other. For the escape of the heaviermaterial radially outward through the partition 24 to the outercompartment of the pan and to the channel 21 which is at the base ofsaid compartment, said partition 24 is formed with suit-able escapeopenings, there being indicated a multiplicity ofholes 26 for thepurpose and additional'openings in the bottom edge of the divisionplate. For, the purpose of bringing about an effective agitation -of thematerial, within and outside of the division plate 2 1, the inner wall18 is formedon the exterior with radial protuill) berances 27, therebeing similar protuberances 2S projecting from the inner surface of theshell 20. 7'

A tailings discharge 29 is provided at the front of the pan, which isformed by a lip or curved flange directed outwardlyfrom the shell 20 ina plane below the top edge of the remainder of the shell. At the ends ofthe tailings discharge 29 are arranged walls 30 extending radiallyoutward from the ends of the shell 20 adjacent the terminals of thetailings discharge 29. A. division plate 24L preferably rises to a planeslightly below the plane ot the top edge of the outer shell 20throughout its length, consequently that portion of the plate 24adjacent the tailings edge 29 above the plane of said tailings edge, isclearly shown in Figures 2 and 4. I

A discharge spout 31 is provided extending from the front of the pan atthe chamber 21 so that the concentrates will thus find an utlet in aplane materially below the tailings discharge and from a point radiallyoutward from the body of the lighter particles, tailings or slimes. Saiddischarge 81, it will bev observed, flares laterally and it inclinesfrom the chamber 21 rising to a height above the plane of the tailingsdischarge. A valve 32 may, as shown, e provided at the base of thedischarge spout 31, said valve being turn ably mounted and having asquared end for receiving wrench or the like for turning it to ailordmore or less of a passage through said valve to the discharge pipe 31 tothus regulate the flow of the concentrates to said discharge pipe. Theforming of the discharge spout flaring; permits the concentrates tospread and therebyclogging of the spout is effectually prevented.

A sight window 38 may be provided in the outer shell 20 as shown in ligure 2.

- A bumper block 34 is providedon the shell 20 at a point diametricallyopposite to the spout 31 and the rear of'the pan. At

a point 90 from the spout or the bumper 34 on the wall 20 at both sidesof the pan are provided pivoted ears to which connecting' rods 36 arepivotally joined, said connecting rods extending rearwardly in parallelrelation and adapted for connec tion with a suitable actuating mechanismto impart oscillatory movement to the pan upon its anti-frictionsupports. The. bumper block reciprocates between two adjustable rubberbumper blocks 37 suitably supported and positioned in the path of thebumper block 34: so as to be engaged there: by, and thus serving thedouble purpose of increasing the agitation and causing a rebound of thepan motion, relieving the stress on the connecting rods and cams, orother suitable devices with which the connecting rods may be connectedfor operation. In this connection it is degirable to point out that theconnecting rods preferably lead from suitable cams or wrist pins on acounter-shaft, not shown, adjacent to the rear portion of the pan, butproperly spaced relative thereto to permit the necessary oscillatory orreciprocating); centrifugal motion to be imparted to the pan and thecontents acted on respectively, the connecting rods having impartedthereto directly opposite action or motion in order to obtain themovement specified. I would state further that my invention resides inthe pan proper and not in the means producing the necessary centrifugaloscillatory motion of the pan; hence any suitable means may be employedto obtain the desired motion.

In practice I operate my improved pan with wet ground material althoughthe apparatus is not limited to the use of material wet ground.

In operation the material fed from the pipe 11 or other suitable feedmeans, falls upon the conical central structure 10 and distributes overthe surface thereof and to the channel 19 at the inner compartment ofthe latter, that is to say, at the inner side of the division plate 24.The oscillatory motion of the pan causes the material in the channel toassume a stratified condition, the heavier concentrates forming astratum at the bottom of the channel. The stratified material finallyarranges itself with the heavier particles filling under centrifugalforce the outermost chamber 21, the provision of said chamber greatlyfacilitating the separation of the heavier concentrates and theseparation is further promoted. by providing the outlet to the dischargespout- 31 at the said chamber 21 and therefore radially outward from thetailings discharge 29, and materially below said tailinns discharge. Theconcentrates also by reason of their greater specific gravity and theresult of centrifugal force fill the chamber 21 and rises in the channel19 in regular gradation upwardly according to the specific gravity andthereby the slimes are effectively prevented from passing; to thedischarge spout 31. At the same time the described assen'iblage resultsin the saving of the smaller concentrates since the settling isprogressed under favorable circumstances and over a sutlicient period oftime before the concentrates reach the discharge, for the effectivesettling of all the concentrates.

in Figures 6 and 7 is shown an embodiment of the invention to carry outthe distinctive mode of functioning "of my improved pan without theemployment of the division plate in the channel 19. VVit-h the divisionplate omitted the pan is made with a wall 18 at the inner side of thechannel 19 rising at the front of the pan above the lower edge of theconed surface of the central feed-receiving structure 10. The up peredge 18 of said wall 18 slopes rearw'ardly at opposite sides andterminates as at 18 short of the medial plane of the pan leaving anopening between the terminals 18 for the rearward escape of thematerial. I provide also vertical barriers 39 extending approximatelyradially at about the transverse medial plane of the pan between theinner wall 18 and the outer wall or shell 20 and disposed above theplane of the base of the conical surface of the structure 10. Saidbarriers 39 and the gradually increasing height of the wall 18 serve toprevent the material fed to the structure 10* from passingrto thechannel 19 forward of said barriers 39 so that the material will berequired to pass in the rear of the transverse medial plane of the panto gradually progress forwardly in the channel 19 toward the dischargespout 31*, thereby insuring the stratification of the material as wellas a movement of the heavier particles laterally outward at the bottomof the channel into the chamber 21 from which the spout 31: leads. Thetailings discharge, 29 is substantially the same as in thefirst-described construction including the end walls 30?. Also, a sightwindow 38 is provided in the outer shell 2O with the pans shown inFigures 6 and 7. Thedescribed means 35, 36 for oscillating the pan maybe employed as well as the bumper 34, which, it is to be understoodcoacts with the previously described bumper stops 37 or theirequivalent. H

In the arrangement of Figure 8 which represents the preferred form ofthe concentrates discharge the shell, a fragment of which is indicatedat 20 is provided with a tailings discharge 29* the same as describedabove. At the forward side of the channel 19", corresponding withchannels '19, 19, is an outlet 32 for the concentrates. Means isprovided for regulating the angular position and the total effectivelength of the concentrates discharge. In the illustrated example use ismade of a ball and socket joint 32 between the outlet 32* and a shortspout section 31 to which section the main spout section 31 is connectedby suitable means, as for example, bolted flanges 31 which arrangementpermits of a main spout section 31 being employed of the desired lengthso that the total effective length of the spout may thereby be varied.At the same time the ball and socket joint or an equivalent meanspermits of varying the angle of the spout. By the described arrangementthe spout may be so formed and so disposed as to regulate the operationaccording to the material being acted upon and to meet the requirementsto permit the operation to progress for the proper separation andstratification of the materials.

I would state in conclusion that while the illustrated examplesconstitute practical embodiments of the invention, I do not limit myselfstrictly to the exact details herein illustrated, since, manifestly, thesame can be considerably varied without departure from the spirit of theinvention as defined in the appended claims.

I-Iavingtlius described my invention, I claim 1. A- concentrator of thepan type, including means to impart oscillatory movement to the pan,means to cause the material to stratify, and a concentrates dischargeprojecting radially outward and upwardly and arranged to permit theescape of the concentrates under centrifugal force from the lowermostand outermost zone of the pan.

Zen oscillating concentrator of the pan type, having at the peripherythereof a channel, a chamber complementary to said channel and arrangedoutwardly of said channel, and a concentrates discharge lead ing fromthe base of the chamber projecting outwardly from said base in the planeinclined upwardly, said discharge being adapted to receive concentratesunder the centrifugal force developed by the oscillation of the pan,

3. An oscillating concentrator of the pan type having at the peripherythereof a channel, a chamber complementary to said channel and outwardtherefrom, and a con centrates discharge leading from said cham her andadapted to receive concentrates under the centrifugal force developed bythe oscillationof the pan, said discharge projecting radially outwardand upward and flaring laterally toward the outer end.

@L. A concentrator of the pan type adapted to receive movements to,subject the material therein tocentrifugal force, said pan having at theperiphery thereof a channel, a chamber complementary to said channel andoutward therefrom, a tailings discharge above said chamber, and aconcentrates discharge leading from the base of said cham her andadapted to receive the concentrates under the centrifugal forcedeveloped by the movements of the pan discharging the same radiallyoutward of said chamber and in a plane above the plane of the top edgethereof.

5. A concentrator of the pan type adapted to receive movements tosubject the material therein to centrifugal force, said pan Too llU

having at the periphery thereof a channel, I

a chamber complementary to said channel and outward therefrom, atailings discharge above said chamber, and a concentrates dischargeleading from said chamber and adapted to receive the concentrates underthe centrifugal force developed by the movements of the pan, saidconcentrates dis charge having its outlet end above said tailingsdischarge.

6. A concentrator of the pan type adapted to receive movements tosubject the material therein to centrifugal force, arcuate stratifyingcompartments in said pan laterally outward from the center of movement,a tailings discharge, and means to permit escape of concentrates from azone at the base of said compartments below said tailings discharge,said means projecting outwardl and upwardly to a point above the planeof the edge of said tailings discharge.

7. A concentrator of the pan type adapted to receive movements tosubject the mate rial therein to centrifugal force, arcuate stratifyingcompartments in said pan laterally outward from the center of movement,a tailings discharge, and means to permit escape of concentrates underthe centrifugal force of the pan, from a zone at the base of saidcompartments below and radially out-- ward from said tailings discharge.

8. In a concentrator of the pan type adapted to receive movements tosubject the material therein to centrifugal force: a feed receivingstructure, stratifying means outward of the center of movement of thepan, a tailings discharge from said means at the top, and means topermit discharge of the concentrates under centrifugal force from a zonebelow, and laterally outward of the vertical plane of, said tailingsdischarge, said means projecting to a plane above said tailingsdischarge.

9. An oscillating concentrator of the pan type including a feedreceiving structure, a stratifying channel radially outward of saidstructure, a chamber offset radially outward from said channel andcommunicating therewith, a concentrates outlet leadtype including a feedreceiving structure, a stratifying annular channel below and extendingabout said structure, a chamber offset laterally outward from andextending about said channel in communication with the latter, aconcentrates outlet from said chamber, and a tailings discharge at theouter side of the channel above said outlet.

11. A concentrator of the pan type including means toimpart oscillatorymovement to the pan, means to cause the material to stratify on the baseof said pan adjacent its outer walls, an outlet permitting escape of theconcentrates from the lowermost zone of the pan, a discharge spout atsaid outlet, and means to vary the angular position of said dischargespout.

12. A concentrator of the pan type including means to impart oscillatorymove ment to the pan, means to cause the material to stratify, an outletpermitting escape of the concentrates from the lowermost zone of thepan, means forming a concentrates discharge at said outlet and variableangularly and with respect to its total effective length.

13. A concentrator of the pan type including means to impart oscillatorymovement to the pan, means to cause the material to stratify, an outletpermitting escape of the concentrates from the lowermost zone of thepan, and a discharge spout at said outlet composed of sectionsandadapted to be varied for varying the total effective length of thespout.

14. An oscillating concentrator of the pan type including a feedreceiving structure, a stratifying channel outside of said structure andadapted to receive material from the latter, agitating protuberances onthe walls of said channel, a concentrates outletin communication withsaid channel at the outer side of the latter, and a tailings dischargeat the outer side of the channel above said outlet.

FRANK E. JoHNEssn.

